Fix homebrew instructions in getting started guide

This copies the fix from #2923 to future releases.

Author: Robin Sonefors

website/docs/getting-started.mdx

@@ -79,7 +79,7 @@ For this guide we will use the cluster user, for complete documentation includin
 
 1. Install the Weave GitOps CLI
    ```
-   brew install weaveworks/tap/weave-gitops
+   brew install weaveworks/tap/gitops
    ```
 
    For other installation methods, see our [installation doc](./installation.mdx).